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Barium sulfate suspension
Contrast agent used during X-rays / From Wikipedia, the free encyclopedia
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Barium sulfate suspension, often simply called barium, is a contrast agent used during X-rays.[1] Specifically it is used to improve visualization of the gastrointestinal tract (esophagus, stomach, intestines) on plain X-ray or computed tomography.[2] It is taken by mouth or used rectally.[3]
![]() 3D model of barium sulfate | |
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AHFS/Drugs.com | Multum Consumer Information |
Routes of administration | by mouth, rectal |
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Formula | BaSO4 |
Molar mass | 233.3896 |
Side effects include constipation, diarrhea, appendicitis, and if inhaled inflammation of the lungs.[2] It is not recommended in people with intestinal perforation or bowel obstruction.[2] Allergic reactions are rare.[1] The use of barium during pregnancy is safe for the baby; however, X-rays may result in harm.[4] Barium sulfate suspension is typically made by mixing barium sulfate powder with water.[1] It is a non-iodinated contrast media.[5]
Barium sulfate has been known since the Middle Ages.[6] In the United States it had come into common medical use by 1910.[7] It is on the World Health Organization's List of Essential Medicines.[8] Some versions contain flavors to try to make it taste better.[1]